This article, which appeared in the Journal of Hellenic Studies (1901) pp. 67-77, was written by the distinguished historian and Syriac scholar E. W. Brooks. The author reconstructs the names and locations of the 9th century Byzantine administrative districts known as themes from the works of Arab geographers including Ibn Khurdadhbah, Al Idrisi (1154), Ibn Al Fakih Al Hamadhani (ca. 902) from Yakut's Dictionary (1224), and Kudama (ca. 930), translating the passages from Ibn Al Fakih. Extensive scholarly notes and map of 9th century Byzantine themes. 13 pdf pages. Book digitized by Google, article extracted and uploaded by user Robert Bedrosian.